Installing the USB to Serial adapter in Mac OS X

Unfortunately installing the USB to Serial adapter in
Mac OS X isn’t as intuitive as it is in other OS’s. So here’s the steps
to install our part number SW-1301 or other USB to Serial adapters that
use the prolific chipset:

Just run through the basic setup instructions and it will install
the driver.

2 - Once that’s done, plug the cable into the computer (without it
being attached to any serial devices). Then we’ll want to make sure
that it is being recognized properly. Click on the apple icon in the
corner and click “about this mac.” This window should come up:

Click the more info button and this window should come up:

Click on the USB link on the left hand side and you should see
“USB-Serial Controller” listed under one of the USB Bus sections. If it
is not then the Cable did not detect properly or the Driver did not
install properly. Before moving on you’ll need to make sure that it is
detecting.

3- If it is detecting then we need to enable it. Go to the apple
button then click “System Preferences.” Click network at the top and
you should see a window like this:

Then you need to click on the Show button and choose the bottom item
in the list, “Network Port Configurations.” The window should change to
this:

Check the box next to usbserial and click apply now. Now your USB to
Serial adapter should be enabled and ready to go.

If it’s still not working feel free to give our tech support a call
or an email.